Vulnerability · Published May 11, 2026 · Assigned by GitHub_M

CVE-2026-43883WWBN AVideo: IDOR in PayPalYPT agreementCancel.json.php Allows Any Authenticated User to Cancel Arbitrary PayPal Subscription Agreements

Medium 4.2

In plain English

A medium-severity authorization bypass via user-controlled key in AVideo from WWBN. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 3.1)4.2Medium

Exploit odds (30 days)0.2%top 90.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

WWBN AVideo is an open source video platform. In versions up to and including 29.0, plugin/PayPalYPT/agreementCancel.json.php cancels a PayPal billing agreement using an attacker-supplied agreement parameter without verifying that the authenticated user owns the agreement. A low-privilege authenticated user who learns or obtains another user's PayPal billing agreement ID can silently suspend the victim's recurring subscription, causing revenue loss to the platform and loss of paid service to the victim. Commit 0da3dcff1eda2f497694bf82b559829471c292c2 contains an updated fix.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	wwbn/avideo	no fix listed	GHSA-958h-qp3x-q4gj

Affected products (as reported)

Vendor	Product	Versions
WWBN	AVideo	<= 29.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

References

https://github.com/WWBN/AVideo/security/advisories/GHSA-958h-qp3x-q4gj x_refsource_CONFIRM
https://github.com/WWBN/AVideo/commit/0da3dcff1eda2f497694bf82b559829471c292c2 x_refsource_MISC